Electricity: motive power systems – Positional servo systems – Limit or end-stop control
Patent
1974-08-07
1978-05-09
Schaefer, Robert K.
Electricity: motive power systems
Positional servo systems
Limit or end-stop control
318468, G05B 500
Patent
active
040889360
ABSTRACT:
An automated tire inspection system employs penetrative emanation such as X-radiation to inspect the integrity of portions of tires fed sequentially along a feed path through a centering station and into a shielded enclosure where an inspection station is defined. An inspection apparatus within the shielded enclosure includes an X-ray emitting tube and an imaging system for producing signals representing the pattern of X-rays directed through the tire by the X-ray tube. A control apparatus for the system includes:
(1) A protection apparatus for preventing overtravel of movable components of the system, including apparatus for sensing the positions of the movable components and controlling elements for moving the movable components and responding to the sensing apparatus to limit movement of the movable components to within a first predetermined range of positions. Additional apparatus senses when a movable component reaches the boundary of another range of positions encompassing the first range and deactuates the system in response thereto;
(2) A system for detecting and identifying malfunctions in the tire inspection system;
(3) A positioning system for maintaining a constant relative position between the X-ray tube and the imaging system;
(4) An interrupt system for manually terminating the automatic operation of the tire inspection system and enabling manual control thereof;
(5) A speed control system for automatically slowing the motion of each movable component as it approaches a predetermined end point of its path of motion, and
(6) A scheduled interrupt system which suspends automatic operation upon the tire inspection system executing a predetermined stop in its automatic operation, to give the operator temporary manual control of a limited number of system operations.
Throughout the operation of the tire inspection system, manual or automatic, the system prevents the execution of potentially dangerous or mechanically destructive operations.
REFERENCES:
patent: 3714537 (1973-01-01), Bur
patent: 3795853 (1974-03-01), Whitehouse
patent: 3843888 (1974-10-01), Fox
Bentivegna Charles R.
Heisner Donald N.
Feldhaus John J.
Monsanto Company
Schaefer Robert K.
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